noun
A main road or highway, especially in ancient Rome. (Mainly used in set phrases, below.)
(electronics) A small hole in a printed circuit board filled with metal which connects two or more layers.
(electronics) An electrical connection which connects two or more layers on a printed circuit board or an integrated circuit.
preposition
By way of; passing through.
By (means of); using.
interjection
(obsolete) Away! Be off!